What is the role of the 'front' pointer in a queue data structure?
It keeps track of the total number of elements in the queue.
It points to the location where the next element will be added.
It points to the element that has been in the queue the longest.
It determines if the queue is full or not.
Which of the following operations on a queue does NOT have a time complexity of O(1) in a standard implementation?
Searching for a specific element
Dequeue
isEmpty
Enqueue
Imagine a print queue in a busy office environment. Which data structure, implemented using an array, would be most suitable for managing this print queue effectively?
Circular Queue
Hash Table
Binary Tree
Stack
What is the maximum number of elements a circular queue of size 'n' can hold?
It depends on the implementation
n + 1
n
n - 1
What is the primary difference between a queue and a stack?
Queues are linear data structures, while stacks are non-linear.
Queues use FIFO (First-In-First-Out), while stacks use LIFO (Last-In-First-Out).
Queues store numbers, while stacks store characters.
Queues use LIFO (Last-In-First-Out), while stacks use FIFO (First-In-First-Out).
How does an array-based queue handle the underflow condition?
By dynamically resizing the array.
By raising an exception or returning an error value when attempting to dequeue from an empty queue.
By overwriting the existing elements.
By using a circular array to reuse the empty spaces.
Which real-world scenario best exemplifies the use of a queue data structure?
Storing a family tree with ancestors and descendants
Finding the shortest route between two points
Tracking the order of tasks assigned to a CPU
Managing a list of students sorted alphabetically
What is the main advantage of using a circular array for implementing a queue compared to a regular array?
Efficient utilization of space after multiple enqueue and dequeue operations
Better handling of sorted data
Reduced memory consumption
Faster access to individual elements
Which of the following real-world scenarios can be effectively modeled using a queue?
Managing a priority-based task list.
Handling customer service requests in a first-come, first-served manner.
Storing the browsing history in a web browser.
Implementing an undo/redo functionality in a text editor.
What data structure is used to implement a priority queue?
Array
Heap
Linked List